SPARQL – SemRepo.org

The public SPARQL endpoint of the SemRepo Knowledge Graph is provided at https://semrepo.org/sparql

Example SPARQL queries:

Programming Languages Used for each topic

PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
PREFIX foaf: <http://xmlns.com/foaf/0.1/>
PREFIX sr: <https://semrepo.org/property/>
PREFIX srclass: <https://semrepo.org/class/>

SELECT ?topic ?progLang (COUNT(?progLang) AS ?langCount)
WHERE {
  GRAPH <https://semrepo.org> {
    ?repository rdf:type srclass:repository .
    ?repository foaf:topic ?topic .
    ?repository sr:hasLanguageReference ?langref .
    ?langref sr:hasLanguageName ?progLang .
  }
}
GROUP BY ?topic ?progLang
ORDER BY DESC(?langCount)
LIMIT 100